Patent US4801245A successfully refreshed from Google Patents.
US4801245A
Expired / Lapsed
US
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Method of damping surges in recirpocating compressors
Assignee: Everllence SE
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Filing: 1988-04-08
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Granted: 1989-01-31
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Expires: 2008-04-08
Abstract
Abstract One or more throttles are accommodated in a compression line and/or in a suction line to damp surges in reciprocating compressors. The size of the open cross-section of the throttle can be varied. The size is established to prevent surges from exceeding a prescribed limit.
Inventors
- 👤 Peter de Haas
- 👤 Robert Ehrich
- 👤 Reidar Joergensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:41
CPC Classifications
F; F04; F04B; F04B11/00; F04B11/0008; F04B11/0091; F16; F16L; F16L55/00; F16L55/02; F16L55/027; F17; F17D; F17D1/00; F17D1/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
A method of damping pressure oscillations in reciprocating compressors comprising the steps of: providing at least one throttle with adjustable flow-through opening in a line of a compressor; measuring pressure fluctuations in said line having said throttle; said fluctuations being superimposed on a working pressure produced by said compressor comparing the measured pressure fluctuations with a predetermined limit; and reducing said flow-through opening of the throttle when said predetermined limit is exceeded, said flow-through opening of said throttle being reduced to a predetermined minimum at which said fluctuations are tolerable; said throttle being continuously adjustable for damping resonance amplified fluctuations; when said predetermined limit is not attained, said flow-through opening of the throttle is increased until said limit is just about to be exceeded, said flow-through opening being adapted to the measured pressure fluctuations up to a constant minimum magnitude of said opening.
Claim 2
Independent Claim
143 words
A method of damping pressure oscillations in reciprocating compressors comprising the steps of: providing at least one throttle with adjustable flow-through opening in a line of a compressor; measuring pressure fluctuations in said line having said throttle; said fluctuations being superimposed on a working pressure produced by said compressor comparing the measured pressure fluctuations with a predetermined limit; and reducing said flow-through opening of the throttle when said predetermined limit is exceeded, said flow-through opening of said throttle being reduced to a predetermined minimum at which said fluctuations are tolerable; said throttle being continuously adjustable for damping resonance amplified fluctuations; when said predetermined limit is not attained, said flow-through opening of the throttle is increased until said limit is just about to be exceeded, said flow-through opening being adapted to the measured pressure fluctuations up to a constant minimum magnitude of said opening.
Claim 3
Dependent Claim
40 words
A method as defined in claim 1, wherein damping of said pressure oscillations occurs from pressure losses produced in said line, said pressure losses being set to a value so that said pressure oscillations are damped to a tolerable level.
Claim 4
Dependent Claim
32 words
A method as defined in claim 1, wherein, when said predetermined limit is not attained, said flow-through opening of the throttle is increwased until said limit is just about to be exceeded.
Claim 5
Dependent Claim
27 words
A method as defined in claim 1, wherein said flow-through opening is adapted to the measured pressure fluctuations up to a constant minimum magnitude of said opening.
Claim 6
Dependent Claim
26 words
A method as defined in claim 3, wherein said flow-through opening is adapted to said operating conditions up to a constant minimum magnitude of said opening.
Claim 7
Dependent Claim
26 words
A method as defined in claim 4, wherein said flow-through opening is adapted to said processing parameters up to a constant minimum magnitude of said opening.
Claim 8
Dependent Claim
79 words
A method as defined in claim 1, wherein said throttle comprises a disk with two axial openings, one of said axial openings having a constant size and being large enough to protect said compressor and said line from pressure backup occurring at maximum flow, the other one of said axial opening having a variable size adjustable by a pin in a radial bore in said disk and extending through said other opening, said pin being engaged by an actuator.
Claim 9
Independent Claim
103 words
A method of damping pressure fluctuations in reciprocating compressors comprising the steps of: providing at least one throttle with adjustable flow-through opening in a line of a compressor; adjusting said flow-through opening of the throttle in relation to operating conditions of the compressor to prevent pressure fluctuations from exceeding a predetermined limit, said fluctuations being superimposed on a working pressure produced by said compressor, said flow-through opening of said throttle being reduced to a predetermined minimum at which said fluctuations are tolerable and pressure drop across said throttle is below a predetermined level; said throttle being continuously adjustable for damping resonance amplified fluctuations.
Claim 10
Independent Claim
103 words
A method of damping pressure fluctuations in reciprocating compressors comprising the steps of: providing at least one throttle with adjustable flow-through opening in a line of a compressor; adjusting said flow-through opening of the throttle in relation to operating conditions of the compressor to prevent pressure fluctuations from exceeding a predetermined limit, said fluctuations being superimposed on a working pressure produced by said compressor, said flow-through opening of said throttle being reduced to a predetermined minimum at which said fluctuations are tolerable and pressure drop across said throttle is below a predetermined level; said throttle being continuously adjustable for damping resonance amplified fluctuations.
Claim 11
Independent Claim
100 words
A method of damping pressure fluctuations in reciprocating compressors comprising the steps of: providing at least one throttle with adjustable flow-through opening in a line of a compressor; adjusting said flow-through opening of the throttle in relation to processing parameters to prevent pressure fluctuations from exceeding a predetermined limit, said fluctuations being superimposed on a working pressure produced by said compressor, said flow-through opening of said throttle being reduced to a predetermined minimum at which said fluctuations are tolerable and pressure drop across said throttle is below a predetermined level; said throttle being continuously adjustable for damping resonance amplified fluctuations.
Claim 12
Independent Claim
100 words
A method of damping pressure fluctuations in reciprocating compressors comprising the steps of: providing at least one throttle with adjustable flow-through opening in a line of a compressor; adjusting said flow-through opening of the throttle in relation to processing parameters to prevent pressure fluctuations from exceeding a predetermined limit, said fluctuations being superimposed on a working pressure produced by said compressor, said flow-through opening of said throttle being reduced to a predetermined minimum at which said fluctuations are tolerable and pressure drop across said throttle is below a predetermined level; said throttle being continuously adjustable for damping resonance amplified fluctuations.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |